Electrically driven PEDOT/PSS actuators

H. Okuzaki; K. Hosaka; H. Suzuki; T. Ito

doi:10.1117/12.847385

9 April 2010 Electrically driven PEDOT/PSS actuators

H. Okuzaki, K. Hosaka, H. Suzuki, T. Ito

Proceedings Volume 7642, Electroactive Polymer Actuators and Devices (EAPAD) 2010; 76422U (2010) https://doi.org/10.1117/12.847385
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

Free-standing films made of poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS) were prepared by casting water dispersion of its colloidal particles. Specific surface area, water vapor sorption, and electroactive polymer actuating behavior of the resulting films were investigated by means of sorption isotherm, and electromechanical analysis. It was found that the non-porous PEDOT/PSS film, having a specific surface area of 0.13 m² g^-1, sorbed water vapor of 1080 cm³(STP) g^-1, corresponding to 87 wt%, at relative water vapor pressure of 0.95. A temperature rise from 25 to 40 °C lowered sorption degree, indicative of an exothermic process, where isosteric heat of sorption decreased with increasing water vapor sorption and the value reached 43.9 kJ mol^-1, being consistent with the heat of water condensation (44 kJ mol^-1). Upon application of 10 V, the film underwent contraction of 2.4% in air at 50% relative humidity (RH) which significantly increased to 4.5% at 90% RH. The principle lay in desorption of water vapor sorbed in the film due to Joule heating, where electric field was capable of controlling the equilibrium of water vapor sorption.

Citation Download Citation

H. Okuzaki, K. Hosaka, H. Suzuki, and T. Ito "Electrically driven PEDOT/PSS actuators", Proc. SPIE 7642, Electroactive Polymer Actuators and Devices (EAPAD) 2010, 76422U (9 April 2010); https://doi.org/10.1117/12.847385

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